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SubjectRe: /proc/stat's intr field looks odd, although /proc/interrupts seems correct
From
> Hi,
>
> I am running 2.6.0-test2-mm4 on an SMP machine with dual Athlon MP 2000+s.
>
> /proc/stat displays:
>
> cpu 13261 0 2603 887671 4399
> cpu0 6936 0 1571 443183 2285
> cpu1 6325 0 1031 444488 2113
> intr 5021986 4539589 5476 0 0 0 0 0 0 0 0 0 0 73888 0 16345 11 379144 0 7533
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
> ctxt 1677244
> btime 1060567182
> processes 1286
> procs_running 1
> procs_blocked 0
>
> /proc/interrupts:
>
> CPU0 CPU1
> 0: 26530 4875571 IO-APIC-edge timer
> 1: 6035 0 IO-APIC-edge i8042
> 2: 0 0 XT-PIC cascade
> 12: 77657 3869 IO-APIC-edge i8042
> 14: 16560 1 IO-APIC-edge ide0
> 15: 11 0 IO-APIC-edge ide1
> 16: 409959 1 IO-APIC-level radeon@PCI:1:5:0
> 17: 0 0 IO-APIC-level EMU10K1
> 18: 7942 0 IO-APIC-level eth0
> NMI: 0 0
> LOC: 4902124 4902123
> ERR: 0
> MIS: 0
>
> I am not sure why the intr line contains all those zeros. Is this normal
> behavior?

Yes, for most architectures, it prints interrupts from 0 thru NR_IRQS:
for (i = 0 ; i < NR_IRQS ; i++)
len += sprintf(page + len, " %u", kstat_irqs(i));
and NR_IRQS varies depending on the kernel build options, but (for x86)
is usually either 16 or 224.

~Randy



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